Question

In Millikan’s oil drop experiment, a charged drop of mass \( 1.8 \times 10^{-13} \, \text{kg} \) is stationary between its plates. The distance between its plates is 0.9 cm, and the potential difference is 2000 V. The number of electrons in the drop is:

• A. 500
• B. 50
• C. 5
• D. 10

Hint:

In Millikan’s experiment, the charge on the oil drop is quantized, and the number of electrons can be found by dividing the total charge by the charge of one electron.

Answer 1

The Correct Option is B